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Hypoxic meiobenthic communities of the Istanbul Strait’s (Bosporus) outlet area of the Black Sea

Hypoxic meiobenthic communities of the Istanbul Strait’s (Bosporus) outlet area of the Black Sea
Hypoxic meiobenthic communities of the Istanbul Strait’s (Bosporus) outlet area of the Black Sea
Meiobenthos abundance and distribution on the Black Sea shelf and the upper slope area off the Bosporus Strait outlet was studied along a depth transect from 75 to 300m water depth. This study represents the first detailed quantitative analysis of the structure and distribution of meiobenthos communities in the transition zone from oxic to anoxic conditions in the Bosporus outlet area of the Black Sea. Meiobenthos was present at all investigated depths and includes 21 taxa. Among these the Nematoda was the dominant taxon. The maximum of total meiobenthos was located at 75m, other peaks occurred at 88 m, 103 m, 160 m, 250 m. At 300 water depth of 300 m the amount of the meiobenthos significantly decreased, while the abundance of such groups as the Ciliophora and Nematoda showed a relative increase in abundance extension. Essential taxonomic richness and abundance of meiofauna is observed in the sediment from the surface layer to 5 cm depth. These results suggest that some benthic eukaryotes can tolerate anoxic and sulfidic conditions. Further studies of this region’s fauna are needed to yield more information about the taxonomic composition of benthos in the transitional oxic/anoxic water masses of the Black Sea.
Meiobenthos, abundance, taxonomic composition, distribution along depths
1303-2712
33-41
Sergeeva, N.G.
1727af93-0702-492e-82b0-4f70187a83fd
Mazlumyan, S.A.
dd3691f8-7865-4dfd-b75b-050f5230e563
Çağatay, M.N.
8bade2aa-0158-4f30-8427-3dd943c9e0ab
Lichtschlag, A.
be1568d9-cc63-4f85-bd38-a93dfd7e245f
Sergeeva, N.G.
1727af93-0702-492e-82b0-4f70187a83fd
Mazlumyan, S.A.
dd3691f8-7865-4dfd-b75b-050f5230e563
Çağatay, M.N.
8bade2aa-0158-4f30-8427-3dd943c9e0ab
Lichtschlag, A.
be1568d9-cc63-4f85-bd38-a93dfd7e245f

Sergeeva, N.G., Mazlumyan, S.A., Çağatay, M.N. and Lichtschlag, A. (2013) Hypoxic meiobenthic communities of the Istanbul Strait’s (Bosporus) outlet area of the Black Sea. Turkish Journal of Fisheries and Aquatic Sciences, 13 (1), 33-41. (doi:10.4194/1303-2712-v13_1_05).

Record type: Article

Abstract

Meiobenthos abundance and distribution on the Black Sea shelf and the upper slope area off the Bosporus Strait outlet was studied along a depth transect from 75 to 300m water depth. This study represents the first detailed quantitative analysis of the structure and distribution of meiobenthos communities in the transition zone from oxic to anoxic conditions in the Bosporus outlet area of the Black Sea. Meiobenthos was present at all investigated depths and includes 21 taxa. Among these the Nematoda was the dominant taxon. The maximum of total meiobenthos was located at 75m, other peaks occurred at 88 m, 103 m, 160 m, 250 m. At 300 water depth of 300 m the amount of the meiobenthos significantly decreased, while the abundance of such groups as the Ciliophora and Nematoda showed a relative increase in abundance extension. Essential taxonomic richness and abundance of meiofauna is observed in the sediment from the surface layer to 5 cm depth. These results suggest that some benthic eukaryotes can tolerate anoxic and sulfidic conditions. Further studies of this region’s fauna are needed to yield more information about the taxonomic composition of benthos in the transitional oxic/anoxic water masses of the Black Sea.

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More information

Published date: March 2013
Keywords: Meiobenthos, abundance, taxonomic composition, distribution along depths
Organisations: Marine Geoscience

Identifiers

Local EPrints ID: 342666
URI: http://eprints.soton.ac.uk/id/eprint/342666
ISSN: 1303-2712
PURE UUID: 268d9b60-6af3-4f4c-b791-7cf10dcc8bfe

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Date deposited: 12 Sep 2012 09:40
Last modified: 14 Mar 2024 11:54

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Contributors

Author: N.G. Sergeeva
Author: S.A. Mazlumyan
Author: M.N. Çağatay
Author: A. Lichtschlag

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